Question

A problem states: "There are 5 more girls than boys at the party. There are 27 children at the party in all. How many boys are there at the party?" Let b represent the number of boys. Which expression represents the number of girls? b + 5 b⋅5 5−b b−5

Answer 1

As there is 5 more girls than boys and b is the number of boys, the expression b + 5 represents the number of girls. 
total there are 27 childrens
b + (b+5) = 27
b + b + 5 = 27
2b = 27 -5 
b =22 / 2
b =11
so the number of boys there are 11 and girls are 11 + 5 = 16 
and total is 16 + 11 = 27